In the second tiger attack at the San Francisco Zoo in barely over a year, resident tiger Tatiana escaped from its enclosure on Christmas Day, attacking three patrons at the zoo's Terrace Cafe. After killing one and critically injuring the others, the tiger was shot to death by police officers called to the scene.

1. Tiger: A Siberian named Tatiana
2. Victims were three friends
3. Killed: 17-year-old Carlos Sousa, Jr., in front of enclosure
4. Critically injured: Two brothers, 18 and 19 years old, in front of Terrace Cafe
5. Zoo staff say Tatiana was "a very mellow cat"
6. December 22, 2006: Same tiger mauled its keeper
7. Lion House and tiger pen closed for 10 months after attack
8. September 2007: Lion House, tiger cage reopened after $250,000 security upgrade
9. Wall around tiger enclosure 12.5 feet — 4 feet lower than recommended by experts
10. Early, inaccurate reports said 4 tigers escaped
11. Police say the tiger may have been provoked by visitors

• San Francisco Chronicle: S.F. Zoo's big cats return to outdoor grottos (February 19, 2008)
• FOXNews.com: Police Suspend San Francisco Zoo Tiger Attack Investigation (January 29, 2008)
• San Francisco Chronicle: S.F. Zoo mauling investigation winding down (January 19, 2008)
  • "The police investigation into the tiger attack at the San Francisco Zoo will soon be reclassified as "inactive" after a search failed to turn up evidence that the victims taunted the animal or committed other crimes, authorities said Friday."
• San Francisco Chronicle: S.F. police search car, cell phones of victims of tiger attack (January 16, 2008)
  • "Authorities have speculated that the car and phones may contain evidence that would indicate whether the brothers taunted the tiger before it escaped its enclosure."
• Los Angeles Times: San Francisco Zoo Reopens 9 Days After Tiger Attack (January 4, 2008)
• FOXNews.com: Visitors Leave Makeshift Memorial to Slain Tiger as San Francisco... (January 3, 2008)
• ABC News: S.F. Zoo Reopens After Tiger Attack (January 3, 2008)
• San Francisco Chronicle: S.F. Zoo visitor saw 2 victims of tiger attack teasing lions (January 3, 2007)
  • "Jennifer Miller, who was at the zoo with her husband and two children that ill-fated Christmas afternoon, said she saw four young men at the big-cat grottos - and three of them were teasing the lions a short time before the tiger's bloody rampage that killed 17-year-old Carlos Sousa Jr."
• Slate: A police radio transcript of the tiger attack at the San Francisco Zoo (January 2, 2008)
• CNN: Police examining items for signs tiger was taunted (January 2, 2008)
  • "Police are investigating whether several items found in the enclosure of a tiger who fatally mauled a 17-year-old man show that the animal was attacked or taunted, San Francisco Zoo spokesman Sam Singer said Wednesday."
• The New York Post: Tiger Brothers Had Slingshots (January 1, 2008)
  • "An empty vodka bottle was also found in a car used by Amritpal Dhaliwal, 19, and his brother, Kulbir, 23, on the day of the mauling, which left 17-year-old Carlos Sousa Jr. dead, according to the source."
• Los Angeles Times: New details of tiger attack released (December 29, 2007)
• FOX News: San Francisco Zoo to Reopen January 3 Following Tiger Attack (December 29, 2007)
• CNN.com: Tiger attack a blow for zoo (December 28, 2007)
• San Jose Mercury News: First zoo worker to report victims' tiger claim didn't believe him (December 28, 2007)
• CNN.com: Police: Teen died saving friend from tiger (December 28, 2007)
• San Francisco Chronicle: Tiger attack: Victim's brother doesn't believe he would taunt beast (December 28, 2007)
  • The Dhaliwal brothers have been hostile to police in the current death investigation and were "extremely belligerent" in an earlier encounter with police this year, authorities say.
• San Francisco Chronicle: Trail of blood apparently led escaped tiger to victims (December 27, 2007)
  • The three victims...were all present just outside the tiger's grotto when the tiger escaped, killed 17-year-old Carlos Sousa, Jr. with a savage slash to the throat, and injured the other two.

• • The injured victims fled, leaving a trail of blood, which police believe the tiger followed for 300 yards up a zoo pathway. As the tiger cornered and attacked one of the brothers, four police officers arrived, distracted the animal and shot it dead.

• • "Somebody created a situation that really agitated her and gave her some sort of a method to break out," [zoo director Manuel] Mollinedo said. "There is no possible way the cat could have made it out of there in a single leap."

• San Francisco Chronicle: S.F. Zoo's Tatiana acted her part as alpha predator... (December 27, 2007)
  • "She was everything that a tiger is supposed to be," said big-cat expert Ronald Tilson. "She was essentially shot and killed for being a tiger."

• • Tilson said he can't recall a tiger ever getting out of its enclosure and killing a zoo visitor. He added that Tatiana's behavior, once she escaped, was very much in keeping with her species.

• • "She was an alpha predator in her environment," he said. "She was killing mammals and eating meat."

• The New York Times: S.F. Police Look for Clues Indicating How Tiger...Escaped (December 27, 2007)
• The Telegraph: Victim may have helped zoo tiger escape (December 27, 2007)
• Today: Family of teen killed by tiger wants answers (December 27, 2007)
• San Francisco Zoological Society: Siberian Tiger Background Information
• Newsweek: Zoos: The Tiger Attack (December 26, 2007)
• Los Angeles Times: Authorities unsure how tiger got out (December 26, 2007)
• FOXNews.com: Police: San Francisco Tiger Attack May Have Been Provoked (December 26, 2007)
• FOX News: Tiger Escapes From San Francisco Zoo Cage, Killing 1, Injuring 2 (December 26, 2007)
• CNN: Escaped tiger shot after killing zoo visitor, injuring 2 others (December 25, 2007)
• San Jose Mercury News: Escaped tiger kills visitor, mauls two others at SF Zoo (December 25, 2007)
• BBC News: Tiger escapes at California zoo (December 25, 2007)
• KTVU San Francisco: One Dead, Two Injured In SF Zoo Tiger Attack (December 25, 2007)
• San Francisco Chronicle: Zoo's public feedings of big cats praised, condemned... (January 16, 2007)
• San Francisco Chronicle: Zoo reopens Lion House 10 months after mauling (September 7, 2007)
• CTV: Siberian tiger mauls San Francisco Zoo keeper (December 23, 2006)

• San Francisco Chronicle: New tiger security expected in a month (December 31, 2007)
• San Francisco Chronicle: Keepers say many were aware of potential for tigers to escape (December 30, 2007)
  • The keeper said one of his more seasoned colleagues happened by, grabbed him by the belt loop and jerked him back, away from the edge. "He shared the secret that people knew - the cat could jump up and take me down," the keeper said.
• San Francisco Chronicle: Security cameras, emergency lights too expensive for most zoos (December 28, 2007)
  • Security cameras and powerful emergency lighting might have helped in the frantic moments after a tiger escaped at the San Francisco Zoo, but such equipment is not commonly found at major U.S. zoos.
• New York Times: Wall Isolating Tiger Habitat Is Shorter Than Zoos Advise (December 28, 2007)
  • "...the concrete wall surrounding the area where the animal had been held was 12 feet 5 inches tall, nearly 4 feet shorter than the recommended national standard."
• MSNBC: Escaped tiger's wall was low (December 27, 2007)

• ABC News: Tiger-Attacked Brothers Hire Legal Pit Bull (January 2, 2008)
  • "Geragos, who is known for his roster of high-profile clients from Michael Jackson and Winona Ryder to Scott Peterson and Susan McDougal, is already making claims about what he says is the zoo's "utter disregard for safety." "
• San Francisco Chronicle: Tiger attack survivors' attorney says zoo ignored cries for help (January 2, 2008)
  • "Anything that a defense attorney says has to be taken with not a pinch of salt, but a ton of salt," Singer said.